For those who doubt the efficacy of using aggression and violence to in a self defence scenario, take note of Albert DeSalvo, the Boston Strangler.

After he was captured it was revealed that he had attacked many more women than his 13 known victims. Multiple women came forward with similar reports that when they responded loudly and violently to his initial actions, he would immediately flee. It is generally considered that his known victims were those targets who either did not know or were not in a position to make noise and fight back.

This information is used in rape prevention and education courses all over the world.

In the acute moment of being attacked, you may need to damage someone's joints, groin, or face in order to survive. If you wish to avoid the unpleasantness of this extremity, leverage your common sense and Aikido training to avoid being in this situation in the first place. Asking martial arts training to save you from having to harm your partner in this extreme environment is like being angry that your license plates have expired. The time for actions you could have taken to ensure everyone's welfare has passed you by some time ago.